"Three men in a land development project"

This article describe a lour years experience dedicated to the foundation o f a territorial development project in partnership concerning the nitrates pollution. The choices mode in order to work out a coherent and reliable ba sis of experimentation. The problem to cast a team in which several institu tes and disciplines are present and with a common aim. The difficulty to pr eserve everybody's aim as maintaining a scientifically and professionally u seful project in multi disciplinarity exchanges.